Replacement filter cartridge assembly having an internal...

Details Replacement filter cartridge assembly having an internal... Replacement filter cartridge assembly having an internal...

2006-04-14

2008-08-26

Prince, Fred (Department: 1797)

Liquid purification or separation

With repair or assembling means

C210S167120, C210S437000

Reexamination Certificate

active

07416663

ABSTRACT:
A replacement filter cartridge assembly for hot tubs, spas and other aquatic environments includes a top end cap, a bottom end cap, a perforated elongated core extending between the end caps, and a pleated filter medium situated between the end caps and disposed circumferentially about the core. The replacement filter cartridge assembly is removably rotatably attachable to an adaptor of a filtering apparatus having a pair of diametrically opposed prongs extending outwardly therefrom. The bottom end cap has a central opening and a pair of diametrically opposed notches situated at the periphery of the central opening. The replacement filter cartridge assembly includes an internal lock ring which is situated on the core at the bottom end cap. The internal lock ring has one or more surfaces which engage the prongs of the adaptor to removably secure the replacement filter cartridge assembly to the adaptor of the filtering apparatus.

REFERENCES:
patent: 5783067 (1998-07-01), Belden
patent: 5891334 (1999-04-01), Gundrum et al.
patent: 5928510 (1999-07-01), Meredith
patent: 5985142 (1999-11-01), Belden
patent: 6063276 (2000-05-01), Felber
patent: 6679990 (2004-01-01), Reinhart
patent: 2003/0075491 (2003-04-01), Griffiths
patent: 0638348 (1995-02-01), None

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